<template>
  <div class="app-container">
    <el-form :model="queryParams" ref="queryForm" size="small" :inline="true" v-show="showSearch" label-width="100px">
      <el-form-item label="轮播图描述" prop="bannerDec">
        <el-input
          v-model="queryParams.bannerDec"
          placeholder="请输入轮播图描述"
          clearable
          @keyup.enter.native="handleQuery"
        />
      </el-form-item>
      <el-form-item label="轮播图状态" prop="bannerStatus">
        <el-select v-model="queryParams.bannerStatus" placeholder="请选择轮播图状态" clearable>
          <el-option
            v-for="dict in dict.type.tea_banner"
            :key="dict.value"
            :label="dict.label"
            :value="dict.value"
          />
        </el-select>
      </el-form-item>
      <el-form-item>
        <el-button type="primary" icon="el-icon-search" size="mini" @click="handleQuery">搜索</el-button>
        <el-button icon="el-icon-refresh" size="mini" @click="resetQuery">重置</el-button>
      </el-form-item>
    </el-form>

    <el-row :gutter="10" class="mb8">
      <el-col :span="1.5">
        <el-button
          type="primary"
          plain
          icon="el-icon-plus"
          size="mini"
          @click="handleAdd"
          v-hasPermi="['tea:banner:add']"
        >新增</el-button>
      </el-col>
      <el-col :span="1.5">
        <el-button
          type="success"
          plain
          icon="el-icon-edit"
          size="mini"
          :disabled="single"
          @click="handleUpdate"
          v-hasPermi="['tea:banner:edit']"
        >修改</el-button>
      </el-col>
      <el-col :span="1.5">
        <el-button
          type="danger"
          plain
          icon="el-icon-delete"
          size="mini"
          :disabled="multiple"
          @click="handleDelete"
          v-hasPermi="['tea:banner:remove']"
        >删除</el-button>
      </el-col>
      <el-col :span="1.5">
        <el-button
          type="warning"
          plain
          icon="el-icon-download"
          size="mini"
          @click="handleExport"
          v-hasPermi="['tea:banner:export']"
        >导出</el-button>
      </el-col>
      <el-col :span="3.5">
        <el-button
          type="info"
          plain
          icon="el-icon-zoom-in"
          size="mini"
          @click="bannerPreview"
          v-hasPermi="['tea:banner:preview']"
        >轮播图预览</el-button>
      </el-col>
      <right-toolbar :showSearch.sync="showSearch" @queryTable="getList"></right-toolbar>
    </el-row>

    <el-table v-loading="loading" :data="bannerList" @selection-change="handleSelectionChange">
      <el-table-column type="selection" width="55" align="center" />
      <el-table-column label="轮播图id" align="center" prop="bannerId" />
      <el-table-column label="轮播图地址" align="center" prop="bannerImg" width="100">
        <template slot-scope="scope">
          <image-preview :src="scope.row.bannerImg" :width="50" :height="50"/>
        </template>
      </el-table-column>
      <el-table-column label="轮播图描述" align="center" prop="bannerDec" />
      <el-table-column label="轮播图状态" align="center" prop="bannerStatus">
        <template slot-scope="scope">
          <dict-tag :options="dict.type.tea_banner" :value="scope.row.bannerStatus"/>
        </template>
        <template slot-scope="scope">
          <el-tag :options="dict.type.tea_banner" :value="scope.row.bannerStatus" v-if="scope.row.bannerStatus==1" type="success">开启</el-tag>
          <el-tag :options="dict.type.tea_banner" :value="scope.row.bannerStatus" v-if="scope.row.bannerStatus==2" type="danger">关闭</el-tag>
        </template>
      </el-table-column>
      <el-table-column label="操作" align="center" class-name="small-padding fixed-width">
        <template slot-scope="scope">
          <el-button
            size="mini"
            type="text"
            icon="el-icon-edit"
            @click="handleUpdate(scope.row)"
            v-hasPermi="['tea:banner:edit']"
          >修改</el-button>
          <el-button
            size="mini"
            type="text"
            icon="el-icon-delete"
            @click="handleDelete(scope.row)"
            v-hasPermi="['tea:banner:remove']"
          >删除</el-button>
        </template>
      </el-table-column>
    </el-table>

    <pagination
      v-show="total>0"
      :total="total"
      :page.sync="queryParams.pageNum"
      :limit.sync="queryParams.pageSize"
      @pagination="getList"
    />

    <!-- 添加或修改轮播图管理对话框 -->
    <el-dialog :title="title" :visible.sync="open" width="500px" append-to-body>
      <el-form ref="form" :model="form" :rules="rules" label-width="100px">
        <el-form-item label="轮播图地址">
          <image-upload v-model="form.bannerImg"/>
        </el-form-item>
        <el-form-item label="轮播图描述" prop="bannerDec">
          <el-input v-model="form.bannerDec" placeholder="请输入轮播图描述" />
        </el-form-item>
        <el-form-item label="轮播图状态">
          <el-radio-group v-model="form.bannerStatus">
            <el-radio
              v-for="dict in dict.type.tea_banner"
              :key="dict.value"
:label="parseInt(dict.value)"
            >{{dict.label}}</el-radio>
          </el-radio-group>
        </el-form-item>
      </el-form>
      <div slot="footer" class="dialog-footer">
        <el-button type="primary" @click="submitForm">确 定</el-button>
        <el-button @click="cancel">取 消</el-button>
      </div>
    </el-dialog>

    <!-- 轮播图预览-->
    <el-dialog :title="title" :visible.sync="openBanner" width="80%" append-to-body>
      <el-carousel :interval="4000" type="card" height="300px">
        <el-carousel-item v-for="(image, index) in bannerList" :key="index" v-if="image.bannerStatus===1">
            <img :src="'http://101.34.48.148:8010/prod-api/'+image.bannerImg" style="width: 100%;height: 100%;" :alt="image.bannerDec">
        </el-carousel-item>
      </el-carousel>
      <div slot="footer" class="dialog-footer">
        <el-button type="primary" @click="closeBanner">关 闭</el-button>
      </div>
    </el-dialog>

  </div>
</template>

<script>
import { listBanner, getBanner, delBanner, addBanner, updateBanner } from "@/api/tea/banner";

export default {
  name: "Banner",
  dicts: ['tea_banner'],
  data() {
    return {
      // 遮罩层
      loading: true,
      // 选中数组
      ids: [],
      // 非单个禁用
      single: true,
      // 非多个禁用
      multiple: true,
      // 显示搜索条件
      showSearch: true,
      // 总条数
      total: 0,
      // 轮播图管理表格数据
      bannerList: [],
      // 弹出层标题
      title: "",
      // 是否显示弹出层
      open: false,
      openBanner:false,
      // 查询参数
      queryParams: {
        pageNum: 1,
        pageSize: 10,
        bannerImg: null,
        bannerDec: null,
        bannerStatus: null
      },
      // 表单参数
      form: {},
      // 表单校验
      rules: {
        bannerImg: [
          { required: true, message: "轮播图地址不能为空", trigger: "blur" }
        ],
        bannerDec: [
          { required: true, message: "轮播图描述不能为空", trigger: "blur" }
        ],
        bannerStatus: [
          { required: true, message: "轮播图状态不能为空", trigger: "blur" }
        ]
      }
    };
  },
  created() {
    this.getList();
  },
  methods: {
    /** 查询轮播图管理列表 */
    getList() {
      this.loading = true;
      listBanner(this.queryParams).then(response => {
        this.bannerList = response.rows;
        this.total = response.total;
        this.loading = false;
      });
    },
    // 取消按钮
    cancel() {
      this.open = false;
      this.reset();
    },
    // 关闭按钮
    closeBanner() {
      this.openBanner = false;
      this.reset();
    },
    // 表单重置
    reset() {
      this.form = {
        bannerId: null,
        bannerImg: null,
        bannerDec: null,
        bannerStatus: 0
      };
      this.resetForm("form");
    },
    /** 搜索按钮操作 */
    handleQuery() {
      this.queryParams.pageNum = 1;
      this.getList();
    },
    /** 重置按钮操作 */
    resetQuery() {
      this.resetForm("queryForm");
      this.handleQuery();
    },
    // 多选框选中数据
    handleSelectionChange(selection) {
      this.ids = selection.map(item => item.bannerId)
      this.single = selection.length!==1
      this.multiple = !selection.length
    },
    /** 新增按钮操作 */
    handleAdd() {
      this.reset();
      this.open = true;
      this.title = "添加轮播图管理";
    },
    /** 轮播图预览按钮操作 */
    bannerPreview() {
      this.reset();
      this.openBanner = true;
      this.title = "轮播图预览";
    },
    /** 修改按钮操作 */
    handleUpdate(row) {
      this.reset();
      const bannerId = row.bannerId || this.ids
      getBanner(bannerId).then(response => {
        this.form = response.data;
        this.open = true;
        this.title = "修改轮播图管理";
      });
    },
    /** 提交按钮 */
    submitForm() {
      this.$refs["form"].validate(valid => {
        if (valid) {
          if (this.form.bannerId != null) {
            updateBanner(this.form).then(response => {
              this.$modal.msgSuccess("修改成功");
              this.open = false;
              this.getList();
            });
          } else {
            addBanner(this.form).then(response => {
              this.$modal.msgSuccess("新增成功");
              this.open = false;
              this.getList();
            });
          }
        }
      });
    },
    /** 删除按钮操作 */
    handleDelete(row) {
      const bannerIds = row.bannerId || this.ids;
      if (row.bannerStatus == 1){
        this.$modal.msgError('当前轮播图正在使用！！！不可以删除')
      }else {
        this.$modal.confirm('是否确认删除轮播图管理编号为"' + bannerIds + '"的数据项？').then(function() {
          return delBanner(bannerIds);
        }).then(() => {
          this.getList();
          this.$modal.msgSuccess("删除成功");
        }).catch(() => {});
      }
    },
    /** 导出按钮操作 */
    handleExport() {
      this.download('tea/banner/export', {
        ...this.queryParams
      }, `banner_${new Date().getTime()}.xlsx`)
    }
  }
};
</script>

<style>

.el-carousel__item:nth-child(2n) {
  background-color: #99a9bf;
}

.el-carousel__item:nth-child(2n+1) {
  background-color: #d3dce6;
}
</style>
